ULN2803A
DARLINGTON TRANSISTOR ARRAY
SLRS049 – FEBRUARY1997
D
D
D
D
D
D
500 mA Rated Collector Current (Single
Output)
High-Voltage Outputs . . . 50 V
Output Clamp Diodes
Inputs Compatible With Various Types of
Logic
Relay Driver Applications
Compatible with ULN2800A Series
N PACKAGE
(TOP VIEW)
1B
2B
3B
4B
5B
6B
7B
8B
GND
description
1
18
2
17
3
16
4
15
5
14
6
13
7
12
8
11
9
10
1C
2C
3C
4C
5C
6C
7C
8C
COM
The ULN2803A is a monolithic high-voltage, high-current
Darlington transistor array. The device consists of eight npn
Darlington pairs that feature high-voltage outputs with
common-cathode clamp diodes for switching inductive loads. The
collector-current rating of each Darlington pair is 500 mA. The
Darlington pairs may be paralleled for higher current capability.
Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line
drivers, and logic buffers. The ULN2803A has a 2.7-kΩ series base resistor for each Darlington pair for operation
directly with TTL or 5-V CMOS devices.
The ULN2803A is offered in a standard 18-pin dual in-line (N) package. The device is characterized for
operation over the temperature range of –20°C to 85°C.
logic symbol†
logic diagram (positive logic)
CLAMP
1B
2B
3B
4B
5B
6B
7B
8B
×
10
1
18
2
17
3
16
4
15
5
14
6
13
7
12
8
11
1B
1
18
1C
COM
1C
2B
2C
3C
3B
4C
5C
4B
6C
7C
5B
8C
† This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
6B
7B
8B
2
3
4
5
6
7
8
17
16
15
14
13
12
11
10
2C
3C
4C
5C
6C
7C
8C
COM
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright  1997, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
ULN2803A
DARLINGTON TRANSISTOR ARRAY
SLRS049 – FEBRUARY1997
schematic (each Darlington pair)
COM
OUTPUT C
2.7 kΩ
Input B
7.2 kΩ
3 kΩ
E
absolute maximum ratings at 25°C free-air temperature (unless otherwise noted)†
Collector-emitter voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 V
Input voltage (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 V
Continuous collector current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mA
Output clamp diode current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mA
Total substrate-terminal current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –2.5 A
Continuous dissipation at (or below) 25°C free-air temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1150 mW
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 20°C to 85°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltages values, unless otherwise noted, are with respect to the emitter/substrate terminal GND.
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
ULN2803A
DARLINGTON TRANSISTOR ARRAY
SLRS049 – FEBRUARY1997
electrical characteristics at 25°C free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TYP
MAX
ICEX
Collector cutoff current
II(off)
Off-state input current
VCE = 50 V,
TA = 70°C,
IC = 500 µA,
See Figure 2
II(on)
Input current
VI = 3.85 V,
See Figure 3
2.4
VCE = 2 V,
V
See Figure 4
IC = 200 mA
IC = 250 mA
IC = 300 mA
3
VI(on)
( )
VCE(sat)
On-state input voltage
Collector emitter saturation voltage
II = 0,
MIN
VCE = 50 V,
See Figure 1
50
50
µA
µA
65
0.93
UNIT
1.35
2.7
mA
V
II = 250 µA,
See Figure 5
IC = 100 mA,
0.9
1.1
II = 350 µA,
See Figure 5
II = 500 µA,
See Figure 5
IC = 200 mA,
1
1.3
IC = 350 mA,
1.3
1.6
See Figure 6
See Figure 7
1.7
2
V
f = 1 MHz
15
25
pF
TYP
MAX
IR
VF
Clamp diode reverse current
Clamp diode forward voltage
VR = 50 V,
IF = 350 mA,
Ci
Input capacitance
VI = 0 V,
50
V
µA
switching characteristics at 25°C free-air temperature
PARAMETER
TEST CONDITIONS
tPLH
tPHL
Propagation delay time, low-to-high-level output
VOH
High-level output voltage after switching
Propagation delay time, high-to-low level output
POST OFFICE BOX 655303
VS = 50 V,,
CL = 15 pF,
RL = 163 Ω,,
See Figure 8
VS = 50 V,
See Figure 9
IO ≈ 300 mA,
• DALLAS, TEXAS 75265
MIN
130
20
VS–20
UNIT
ns
mV
3
ULN2803A
DARLINGTON TRANSISTOR ARRAY
SLRS049 – FEBRUARY1997
PARAMETER MEASUREMENT INFORMATION
Open VCE
Open VCE
IC
II(off)
ICEX
Open
Figure 2. II(off) Test Circuit
Figure 1. ICEX Test Circuit
Open
Open
IC
II
VI
Open
VI
VCE
Figure 3. II(on) Test Circuit
Figure 4. VI(on) Test Circuit
Open
IC
hFE =
II
IC
II
VR
IR
Open
VCE
Figure 6. IR Test Circuit
Figure 5. hFE, VCE(sat) Test Circuit
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
ULN2803A
DARLINGTON TRANSISTOR ARRAY
SLRS049 – FEBRUARY1997
PARAMETER MEASUREMENT INFORMATION
IF
VF
Open
Figure 7. VF Test Circuit
Input
Open
VS = 50 V
RL = 163 Ω
Pulse
Generator
(see Note A)
Output
CL = 15 pF
(see Note B)
Test Circuit
< 5 ns
Input
10%
< 10 ns
90%
50%
90%
50%
0.5 µs
tPHL
Output
VIH
(see Note C)
10%
0
tPLH
50%
50%
Voltage Waveforms
NOTES: A. The pulse generator has the following characteristics: PRR = 1 MHz, ZO = 50 Ω.
B. CL includes probe and jig capacitance.
C. VIH = 3 V
Figure 8. Propagation Delay Times
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
ULN2803A
DARLINGTON TRANSISTOR ARRAY
SLRS049 – FEBRUARY1997
PARAMETER MEASUREMENT INFORMATION
VS
Input
2 mH
163 Ω
Pulse
Generator
(see Note A)
Output
CL = 15 pF
(see Note B)
Test Circuit
< 5 ns
Input
10%
< 10 ns
90%
1.5 V
90%
1.5 V
VIH
(see Note C)
10%
0
40 µs
VOH
Output
Voltage Waveforms
NOTES: A. The pulse generator has the following characteristics: PRR = 12.5 KHz, ZO = 50 Ω.
B. CL includes probe and jig capacitance.
C. VIH = 3 V
Figure 9. Latch-Up Test
6
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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Copyright  1996, Texas Instruments Incorporated